In the past, Carracks that had been converted to the Merchant Carrack variant were included in some publications but then later excluded from later publications on the grounds that they were not used as offensive weapons:

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It is not a WarShip per say, so it is not included in the rolls of offensive weapons. Same with the Clan Merchant Carracks, they were removed because they should never had been included in the first place. But Clan Nova Cat does have some merchant Carracks left, even if they have no proper WarShips.